1,1-Dimethylhydrazine
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CAS
57-14-7
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(CH3)2NNH2
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RTECS
MV2450000
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Synonyms & Trade Names
Dimazine, DMH, UDMH, Unsymmetrical dimethylhydrazine
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DOT ID & Guide
1163 / 131
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Exposure
Limits
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NIOSH REL: Ca C 0.06 ppm (0.15 mg/m3) [2-hr] See Appendix A
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OSHA PEL: TWA 0.5 ppm (1 mg/m3) [skin]
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IDLH
Ca [15 ppm]
See: 57147
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Conversion
1 ppm = 2.46 mg/m3
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Physical Description
Colorless liquid with an ammonia- or fish-like odor.
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MW: 60.1
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BP: 147°F
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FRZ: -72°F
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Sol: Miscible
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VP: 103 mmHg
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IP: 8.05 eV
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Sp.Gr: 0.79
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Fl.P: 5°F
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UEL: 95%
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LEL: 2%
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Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
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Incompatibilities & Reactivities
Oxidizers, halogens, metallic mercury, fuming nitric acid, hydrogen peroxide [Note: May ignite SPONTANEOUSLY in contact with oxidizers.]
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Measurement Methods
NIOSH 3515
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin; choking, chest pain, dyspnea (breathing difficulty); drowsiness; nausea; anoxia; convulsions; liver injury; [potential occupational carcinogen]
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Target Organs
central nervous system, liver, gastrointestinal tract, blood, respiratory system, eyes, skin
Cancer Site
[in animals: tumors of the lungs, liver, blood vessels & intestines]
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See also: INTRODUCTION
See ICSC CARD: 0147 See MEDICAL TESTS: 0083
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